Tcl can be fairly hefty relative to Lua. EDIT: I forgot about Jim Tcl and other lighter weight implementations. I need to try those. "Embedded" may include so

Tcl can be fairly hefty relative to Lua. EDIT: I forgot about Jim Tcl and other lighter weight implementations. I need to try those. "Embedded" may include something big enough to run , say, Lubuntu, and in those domains, it's very nice to have. Lua is more likely to fit on a PIC ( although really, for those, low latency means 'C', usually - but the task is usually small enough not to challenge the limits of using 'C' safely). As to "larger audience", I think Tcl benefited greatly by not having one and having some seriously heavyweight greybeards steering it. $DEITY bless Perl, but it's not been treated well by its sheer popularity. EDIT: removed digressive paragraphs.